public class American extends Peopel{
    public void americanBoxing(){
        System.out.println("直拳，勾拳，组合拳");
    }
    public void speakHello(){
        System.out.println("how do you do");
    }
    public void averageHeight(){
        System.out.println("American' average weighr:75.0kg");
    }
    public void averageWeight(){
        System.out.println("American' average heighr:176cm");
    }
}
